For the past three years, SM University Integrated School was ruled by two girl groups led by Kang Seulgi and Irene Bae. And for those years, the two groups just do whatever without messing up with each other though hate were evidently visible to both sides. But in their last year in senior high, an unexpected turn of events happened. Kang Seulgi and Irene Bae were put in the same class. Is it going to be disaster or a chance of remembering the past that has forgotten? 

Irene attempted to commit suicide but she wasn't lucky enough to be successful and instead she gained a special gift of seeing a ghost who have monolid eyes. Desperate to get rid of her, she don't have any choice but to fulfill her wishes. But what will happen if Irene find out the truth about the ghost with the monolid eyes? Will she wanted to die or live more?

Being Supergirl is hard for Seulgi specially that she have to keep her identity to her bestfriend Irene Bae Luthor. She was terrified at the thought of losing her and so she kept on pretending and pretending that Seulgi and Supergirl were different. Till one day, she had the courage to finally revealed her identity and Irene seemed to accept it and have forgiven her. But much to her surprise, Irene was just plotting a revenge at her and was walking in a dark path that Luthors were known for.

Irene Bae and Seulgi Kang, two of the most well known actresses promised that they will be together forever but after two years Irene quit her career, left and they ended up with a broken promise. After eight long years Seulgi found Irene again. Thinking of how bad she messed up in the past, will she fight for their promise or simply give up?

After five long years, Irene came back to get revenge on Seulgi for cheating on her. But what will happen if Irene found out the whole truth of what happened that day and that Seulgi didn't really cheat on her. Will she fight for her or will she just give up on her?

What happens when one of the most in demand actress Irene Bae needs to work in a project as a love interest for Kang, Seulgi, her most hated rival in the industry. Will she continue to hate her? Or will she learn to love her instead?

"When I grow up I want to marry Joohyun."  They said that if you have a dream just work hard and chances are, you're going to reach it. And that's what Seulgi did. She have never give up nor wavered in chasing for her dream.... a dreaming of marrying Joohyun. But what awaits the bear in the end? A fulfilled or crushed dream?        

Seulgi always wanted to be a Presidential Body Guard. It's a noble duty to be able to protect the most important person in your country even though your life is on the line. That's what Seulgi thought. But what will happen if instead of protecting the President, she was assigned to protect his spoiled brat daughter. Will she able to survive being her bodyguard when Irene, the President's daughter was very known to be the most stubborn and cold-hearted spoiled brat girl?

After three long years, Lisa decided to touch her late girlfriend's things. From there, she found out a letter telling her to search for Jennie Kim. In order to do that she asked Seulgi's help to find her. But what will happen if they also found out that Irene, Seulgi's girlfriend have survived the car accident, lost her memories and was living together with Jennie? And what if Jennie Kim was a part of the past that Lisa have forgotten?  Find out what will happen to SEULRENE and JENLI

They said life is too short not to say how you feel to the person you love. Well, in my case indeed life is too short, I’ve got only a year to live if I won’t be able to find a heart donor. So today, I decided that I will confess to her.